| 摘要 |
A safety device for extracting vehicle access ramps, formed by two grooved supports (10 and 11) coupled one inside the other in the same direction. The walls of both supports are traversed by two shafts (12, 13) on which two freely rotatable wheels (14, 15) are assembled. One of the shafts (12) traverses the walls of the outer support (10) through oblong holes (16), such that the inner support (11) swivels on the second shaft (13) with respect to the outer support (10). The two supports are connected by means of a spring (19) constantly driving the inner support (11) towards a raised position with respect to the outer support (10). |
